"The computer world is notorious for its obsession with what is new - largely thanks to the relentless engine of Moore's Law that endlessly presents programmers with more powerful machines.
Given such permanent change, anything that survives for more than one generation of processors deserves a nod.
Think then what the Unix operating system deserves because in August 2009, it celebrates its 40th anniversary. And it has been in use every year of those four decades and today is getting more attention than ever before."